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OMD: Can I take the same pictures with the 12mm f2.0 and the 17mm f1.8 ?

Started Nov 27, 2012 | Discussions thread
richarddd
richarddd Veteran Member • Posts: 3,446
Re: There are also arguments....

tedolf wrote:

that I have read on this board others suggesting that if you take that cropped image and blow it back up to 8 x10" through some sort of majic the DOF changes as well.

I don't believe it but some here do.

Tedolph

The argument is that DOF is measured by circle of confusion. When you blow your picture up to 8x10, magically all the small circles of confusion become larger circles confusion, which mean a change in DOF.

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